Improvement in compounds for tuyeres



UNITED STATES PATENT OEEIoE.

JAMES E. ATWOOD, OF PITTSBURG, PENNSYLVANIA.

IMPROVEMENT IN COMPOUNDS FOR TUYERES.

Specification forming part of Letters Patent No. 138,781, dated May 13,1873 5 application filed May 5, 1873.

To all whom it may concern:

Be it known that I, JAMEs E. ATWOOD, of Pittsburg, in the county ofAllegheny and State of Pennsylvania, have invented an Improved Oompoundfor Making Tuyeres, of which the following is a specification:

This invention relates to the tuyeres of Bessemer, Kelly, or otherconverters which are molded from a plastic refractory material; and itconsists in a compound formed from plumbago, preferably old crucibles,old firebrick, German or other plastic clays, burned or unburned sand,and stone clays, preferably Mount Savage, which is a fire-brick clay,which materials are intimately mixed and thorough- 1y worked in themanner hereinafter specified.

Take of plumbago or old crucibles about thirty parts; fire-brick, thirtyparts; German or other plastic clay, twenty parts; sand, burned orunburned, ten parts; and stone clay, Mount Savage, ten parts; mix themthoroughly and put them. in any of the well-known mills, grinding themtogether until intimately mixed and sufficiently fine for the purposerequired. The mass is then dampened with water until sufficientlyplastic to be readily molded, when the tuyere can be made in the mannercommonly practised in the art.

Tuyeres-he'retofore made from the several fire-clays, compounds of thesame, ganister, 850., would at the best last but from three to fiveheats or blows, when the tuyere as well as the bottom lining of theconverter required repairing. The size and unwieldiness of the converterrendered repairing a severe tax upon the workmen, while the timerequired for the converter to cool was another loss to the manufacturer.As a consequence large establishments have kept a supply of spareconverters to replace others as the lining burned out. My presentcompound will remedy this to a great extent, as a tuyere molded from itwill last from twelve to twenty-four heats or blows.

What I claim is 1. A compound consisting of old crucibles, fire-brick,German clay, and burned or nu burned sand, for formingconverter-tuyeres, as set forth.

2. A compound consisting of plumbago, firebriek, Germ an clay, sandburned or unburned, and Mount Savage stone clay, as set forth, forforming the tuyeres of Bessemer or other converters.

JAMES E. ATWOOD.

Witnesses:

CHARLES ZIMMERMAN, LUTHER MARTINN.

